Face Gear Drives Design Analysis And Testing For Helicopter Transmission Applications
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Face Gear Drives Design Analysis And Testing For Helicopter Transmission Applications
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Author :
language : en
Publisher:
Release Date : 1992
Face Gear Drives Design Analysis And Testing For Helicopter Transmission Applications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Face Gear Drives
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Author : Faydor Litvin
language : en
Publisher:
Release Date : 1992-10-01
Face Gear Drives written by Faydor Litvin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-10-01 with categories.
Grandview United Church 1891 1967 Past And Present
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Author :
language : en
Publisher:
Release Date : 1967*
Grandview United Church 1891 1967 Past And Present written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967* with categories.
Face Gear Drive With Spur Involute Pinion Geometry Generation By A Worm Stress Analysis
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Author :
language : en
Publisher:
Release Date : 2002
Face Gear Drive With Spur Involute Pinion Geometry Generation By A Worm Stress Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
A face gear drive with a spur involute pinion is considered. The generation of the face gear is based on application of a grinding or cutting worm whereas the conventional method of generation is based on application of an involute shaper. An analytical approach for determination of: (1) the worm thread surface, (2) avoidance of singularities of the worm thread surface, (3) dressing of the worm, and (4) determination of stresses of the face-gear drive, is proposed. A computer program for simulation of meshing and contact of the pinion and face-gear has been developed. Correction of machine-tool settings is proposed for reduction of the shift of the bearing contact caused by misalignment. An automatic development of the model of five contacting teeth has been proposed for stress analysis. Numerical examples for illustration of the developed theory are provided.
Experimental Evaluation Of Face Gears For Aerospace Drive System Applications
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Author :
language : en
Publisher:
Release Date : 1996
Experimental Evaluation Of Face Gears For Aerospace Drive System Applications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Handbook On Face Gear Drives With A Spur Involute Pinion
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-13
Handbook On Face Gear Drives With A Spur Involute Pinion written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-13 with categories.
The use of face gears in power transmission and drive systems has a significant number of benefits. Face gears allow a variety of new transmission arrangements as well as high reduction ratio capability. This leads to drive system weight reduction and improvements in performance. In this work, basic information about the design and analysis of face gear drives is presented. The work considers face gears in mesh with spur involute pinions for both intersecting axes and offset drives. Tooth geometry, kinematics, generation of face gears with localized bearing contact by cutting and grinding, avoidance of tooth undercutting, avoidance of tooth pointing, tooth contact analysis, and algorithms for the simulation of meshing and contact arc all topics which are discussed. In addition, applications of face gear drives are presented. Included are design uses in aerospace applications such as helicopter transmissions, split-torque face gear arrangements, comparisons of face gears with bevel gears, and general design considerations. Litvin, F. L. and Egelja, A. and Tan, J. and Chen, D. Y.-D. and Heath, G. Glenn Research Center NCC3-356; RTOP 581-30-13; DA Proj. 1L1-62211-A4-7A
Face Gear Drive With Helical Involute Pinion
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-31
Face Gear Drive With Helical Involute Pinion written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-31 with categories.
A new type of face-gear drive with intersected axes of rotation formed by a helical involute pinion and conjugated face-gear has been investigated. Generation of face-gears by a shaper free of undercutting and pointing has been investigated. A new method of grinding or cutting of face-gears by a worm of special shape has been developed. A computerized design procedure has been developed to avoid undercutting and pointing by a shaper or by a generating worm. Also, a method to determine the limitations of the helix angle magnitude has been developed. The method provides a localization of the bearing contact to reduce the shift of bearing contact caused by misalignment. The analytical method provides a simulation of the meshing and contact of misaligned gear drives. An automatic mesh generation method has been developed and used to conduct a 3D contact stress analysis of several teeth. The theory developed is illustrated with several examples.Litvin, Faydor L. and Fuentes, Alfonso and Gonzalez-Perez, Ignacio and Piscopo, Alessandro and Ruzziconi, PaoloGlenn Research CenterSHAPERS; GEAR TEETH; TRANSMISSIONS (MACHINE ELEMENTS); STRESS ANALYSIS; SINGULARITY (MATHEMATICS); HELICES; MECHANICAL ENGINEERING; AXES OF ROTATION; COMPUTER SYSTEMS DESIGN; CONJUGATION; MISALIGNMENT; POSITION (LOCATION); MECHANICAL DRIVES; HELICOPTERS; GRID GENERATION (MATHEMATICS)
Experimental Testing Of Prototype Face Gears For Helicopter Transmissions
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Author :
language : en
Publisher:
Release Date : 1992
Experimental Testing Of Prototype Face Gears For Helicopter Transmissions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
An experimental program to test the feasibility of using face gears in a high-speed and high-power environment was conducted. Four face gear sets were tested, two sets at a time, in a closed-loop test stand at pinion rotational speeds to 19,100 rpm and to 271 kW (364 hp). The test gear sets were one-half scale of the helicopter design gear set. Testing the gears at one- eighth power, the test gear set had slightly increased bending and compressive stresses when compared to the full scale design. The tests were performed in the NASA Lewis spiral bevel gear test facility. All four sets of gears successfully ran at 100 percent of design torque and speed for 30 million pinion cycles, and two sets successfully ran at 200 percent of torque for an additional 30 million pinion cycles. The results, although limited, demonstrated the feasibility of using face gears for high-speed, high-load applications.
Handbook On Face Gear Drives With A Spur Involute Pinion
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Author : Faydor L. Litvin
language : en
Publisher:
Release Date : 2000
Handbook On Face Gear Drives With A Spur Involute Pinion written by Faydor L. Litvin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Gearing categories.
The use of face gears in power transmission and drive systems has a significant number of benefits. Face gears allow a variety of new transmission arrangements as well as high reduction ratio capability. This leads to drive system weight reduction and improvements in performance. In this work, basic information about the design and analysis of face gear drives is presented. The work considers face gears in mesh with spur involute pinions for both intersecting axes and offset drives. Tooth geometry, kinematics, generation of face gears with localized bearing contact by cutting and grinding, avoidance of tooth undercutting, avoidance of tooth pointing, tooth contact analysis, and algorithms for the simulation of meshing and contact are all topics which are discussed. In addition, applications of face gear drives are presented. Included are design uses in aerospace applications such as helicopter transmissions, split-torque face gear arrangements, comparisons of face gears with bevel gears, and general design considerations.
Design Generation And Tooth Contact Analysis Tca Of Asymmetric Face Gear Drive With Modified Geometry
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Author :
language : en
Publisher:
Release Date : 2001
Design Generation And Tooth Contact Analysis Tca Of Asymmetric Face Gear Drive With Modified Geometry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
A new type of face gear drive for application in transmissions, particularly in helicopters, has been developed. The new geometty differs from the existing geometry by application of asymmetric profiles and double-crowned pinion of the face gear mesh. The paper describes the computerized design, simulation of meshing and contact, and stress analysis by finite element method. Special purpose computer codes have been developed to conduct the analysis. The analysis of this new type of face gear is illustrated with a numerical example.